[quimico]

why can I separate a solution of cross liked polyvinyl acetate in water for its disposal by mixing it with saturated brine salt? Is there a formation of colloids? do they separate because the density of the PVAc is lower tham the density of the brine salt or there is something more? what is the optimal pH to achieve a good separation?
thanks

[Jesse2024]

I would imagine the two compounds competing for solvation, e.g. the salt ions and the polyvinyl acetate would cause the one with weaker interactions with water to precipitate out.  Basically the salt ions displace the PVA.  As for the pH, I'm not sure.